Well, until you consume the formula as prescribed you are not likely to experience any kind of negative effects because the formula is designed with herbs and clinically approved substances. However, if you exceed the daily dosing of the formula you may experience some negative effects which are temporary. But it prolongs when you continue with overdosing. So, consume in prescribe doses to avoid overdosing effects.The FDA does not certify dietary supplement products, such as Magnum XT. However, Magnum XT is manufactured in an FDA registered facility that follows GMP (Good Manufacturing Practice) guidelines. And the Magnum XT Manufactured in USA.Click Here pnews.com/press-release/newmediawire/ceb0476c868ecb2836afb52dd3f000ed